org.eclipse.emf.ecp.common.spi
Class BidirectionalMap<K,V>

java.lang.Object
  org.eclipse.emf.ecp.common.spi.BidirectionalMap<K,V>

Type Parameters:

K - the type of the key

V - the type of the value

public class BidirectionalMap<K,V>
extends Object

Convenience class for mapping keys to values and vice versa. Both, keys and values, have to be unique.

Since:

1.5

Author:

emuller

Constructor Summary

BidirectionalMap()
Default constructor.

Method Summary

K	getByValue(V value) Returns the key belonging to the given value.
V	getValue(K key) Returns the value belonging to the given key.
Set<K>	keys() Returns all keys.
void	put(K key, V value) Associates the specified value with the specified key in this map and vice versa.
V	removeByKey(K key) Removes the bidirectional mapping for the given key.
K	removeByValue(V value) Removes the bidirectional mapping for the given value.
Set<V>	values() Returns all values.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BidirectionalMap

public BidirectionalMap()

Default constructor.

Method Detail

put

public void put(K key,
                V value)

Associates the specified value with the specified key in this map and vice versa.

Parameters:

key - the key

value - the value

removeByKey

public V removeByKey(K key)

Removes the bidirectional mapping for the given key.

Parameters:

key - the key to be removed

Returns:

the value that was associated with the key

removeByValue

public K removeByValue(V value)

Removes the bidirectional mapping for the given value.

Parameters:

value - the value to be removed

Returns:

the key that was associated with the value

getValue

public V getValue(K key)

Returns the value belonging to the given key.

Parameters:

key - the key whose value should be looked up

Returns:

the value belonging to the given key

getByValue

public K getByValue(V value)

Returns the key belonging to the given value.

Parameters:

value - the key whose value should be looked up

Returns:

the key belonging to the given value

keys

public Set<K> keys()

Returns all keys.

Returns:

a set of all keys

values

public Set<V> values()

Returns all values.

Returns:

a set of all values